From entry-level 520d to flagship 507bhp M5, the BMW 5-Series never fails to impress dynamically at least. In terms of styling, it�s a different matter. The kindest thing we can say is that the design has grown on us over time, although the bodywork remains clumsy and heavy-handed.Exactly the same criticism can be levelled at the driving environment. With its tall, slabby console and bulky binnacles, it�s the least attractive layout here. Worse still is the interior�s lack of stowage � there�s no handily accessible compartments on the transmission tunnel console.As a result, the BMW�s cockpit isn�t as welcom�ing as that in any opponent here. That�s a shame, because the driver is very well catered for. The seat is very comfortable and also the most supportive on test, with a spot-on position.Occupants in the back have plenty to be happy about, too, thanks to the well shaped, high-backed rear seats.

And the 520-litre boot is generous.The engine is the best here for keen drivers � smooth and cultured, with minimal turbo lag and consistent power delivery across the rev range. But the 525d doesn�t perform any better than its riv�als, and the springy clutch action of the otherwise good six-speed manual box is hard work in traffic.BMW now seems to be getting to grips with run-flat tyres. The ride still isn�t as smooth as the Merc�s, but most ripples, ruts and ridges are dealt with well. The car�s sporty image means firm suspension, yet the handling makes this worthwhile. The 5 really enjoys being thrown into corners, and has the best steering feedback and body control.